We went winter camping. It got down to about 0 that night and I used a fleece liner with the bag. This seemed to work very well! I stayed plenty warm and had enough room to move around. The hood fit around my head well and I did not feel any cold spots. I about 6' tall and the regular bag was just the right size, I was worried it would be to short.
Good bag.

This bag is great for the rolly-polly camper. It has enough room for me to twist and turn while I sleep, and still keeps me warm. A helpful hint while camping in the cooler temperatures: put your clothing for the next day in the bottom of your sack - it will keep you warmer by filling more of your sleeping bag, and your clothes will be warm for the next day.